Hi Roasters
After trawling through as many threads as I could find, I thought I would try and consolidate some of the questions relating to adding the USB Dataloggin thermocouple to a Behmor Roaster.
What I have found is a good sticky thread on the USB Logger, Information on the CS roasting software and a good template
for drilling the Behmor.
Now as someone that is about to go down the same path, I have been wondering about a few aspects.
Firstly, relating to the different kinds of temp probes.
When you buy the USB logger from bean bay, you will receive a multi-meter which has what’s called the Thermocouple Bead and a probe called Twisty Cord Thermocouple Probe
now, from my understanding. It seems that the Bead probe is good for measuring air temp.
I’m not exactly sure what the twisty cord one is used for, but I can only assume you could place this in the beans if you were using a Corretto or similar.
Available on the bean bay is also
Thermocouple Probe Stainless Braid 25mm and a 100mm
this seems to be the probe that is suggested in the sticky thread when you drill a Behmor
Placement of probes.
Now, from what I have found, you can either use the bead probe of the stainless steel probe (if you drill)
for those that don’t want to drill (like me) it sounds like a viable alternative to use the bead.
The problem is that is hard to find a place for the bead. I have tried the following 3 locations
Also; the cable on the bead does not melt as it can withstand very high heat.
1) Under the chaff tray (placed on the oven bed, and the chaff tray inserted onto)
2) On top of the chaff tray (in-between the metal flippy things that move up and down on the chaff tray)
3) Twisted around the left hand side bracket that hold the roasting drum.
What I found was none of them got anywhere near 200 deg, I’m guessing that 200 deg is the ideal temp for start of FC (based on the roasting spreadsheet)
Placement under the chaff tray only read to about 110 max...
Roast profile after first roast (placed under chaff tray)

Placement on top of the chaff tray read to around 140-150
Placement on the bracket read to around 189 deg.
Roast 3 -

Are these temperatures normal?
Would I get a better result on my reader if drilled the Behmor. I don’t think that it will be much better with the stainless steel probe?
I understand this is a lot of questions but I think it would be helpful to others looking to do the same.
After trawling through as many threads as I could find, I thought I would try and consolidate some of the questions relating to adding the USB Dataloggin thermocouple to a Behmor Roaster.
What I have found is a good sticky thread on the USB Logger, Information on the CS roasting software and a good template
for drilling the Behmor.
Now as someone that is about to go down the same path, I have been wondering about a few aspects.
Firstly, relating to the different kinds of temp probes.
When you buy the USB logger from bean bay, you will receive a multi-meter which has what’s called the Thermocouple Bead and a probe called Twisty Cord Thermocouple Probe
now, from my understanding. It seems that the Bead probe is good for measuring air temp.
I’m not exactly sure what the twisty cord one is used for, but I can only assume you could place this in the beans if you were using a Corretto or similar.
Available on the bean bay is also
Thermocouple Probe Stainless Braid 25mm and a 100mm
this seems to be the probe that is suggested in the sticky thread when you drill a Behmor
Placement of probes.
Now, from what I have found, you can either use the bead probe of the stainless steel probe (if you drill)
for those that don’t want to drill (like me) it sounds like a viable alternative to use the bead.
The problem is that is hard to find a place for the bead. I have tried the following 3 locations
Also; the cable on the bead does not melt as it can withstand very high heat.
1) Under the chaff tray (placed on the oven bed, and the chaff tray inserted onto)
2) On top of the chaff tray (in-between the metal flippy things that move up and down on the chaff tray)
3) Twisted around the left hand side bracket that hold the roasting drum.
What I found was none of them got anywhere near 200 deg, I’m guessing that 200 deg is the ideal temp for start of FC (based on the roasting spreadsheet)
Placement under the chaff tray only read to about 110 max...
Roast profile after first roast (placed under chaff tray)
Placement on top of the chaff tray read to around 140-150
Placement on the bracket read to around 189 deg.
Roast 3 -
Are these temperatures normal?
Would I get a better result on my reader if drilled the Behmor. I don’t think that it will be much better with the stainless steel probe?
I understand this is a lot of questions but I think it would be helpful to others looking to do the same.


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